**Core Concept**
The development of pit and fissure sealants is a significant advancement in the prevention of dental caries. Pit and fissure sealants are a type of dental material that is applied to the occlusal surfaces of teeth, particularly in areas with deep grooves and fissures, to prevent the accumulation of bacteria and food particles, thereby reducing the risk of caries.

**Why the Correct Answer is Right**
The first pit and fissure sealant was developed in 1971 by Dr. Michael Buonocore, an American dentist. This innovation marked a significant shift in dental caries prevention, from focusing solely on topical fluoride applications and oral hygiene practices to a more proactive approach of sealing off susceptible areas from bacteria and food particles. The use of pit and fissure sealants has been widely adopted and has contributed significantly to the decline in dental caries prevalence worldwide.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify the year of development of the first pit and fissure sealant.
**Option B:** This option is incorrect as it does not mention the name of the dentist who developed the first pit and fissure sealant.
**Option C:** This option is incorrect as it does not provide any information about the development of pit and fissure sealants.
**Option D:** This option is incorrect as it does not specify the correct year of development of the first pit and fissure sealant.

**Clinical Pearl / High-Yield Fact**
Pit and fissure sealants are most effective when applied to teeth with deep grooves and fissures, particularly in children and adolescents, before the eruption of permanent molars. Regular follow-up appointments are essential to ensure the longevity of the sealant and to monitor for any signs of caries or sealant failure.

**Correct Answer: D. 1971**